Sealing device with increased concrete adhesion strength

Abstract

A sealing device and a method for producing a sealing device and to use of a sealing device for waterproofing of a substrate, the sealing device including a functional layer having a first major surface and a second major surface and a barrier layer directly or indirectly connected to the second major surface of the functional layer, wherein the functional layer includes at least one first solid filler having a median particle size d 50 in the range of 0.5-100 μm and at least one second solid filler different from the at least one first solid filler.

The invention claimed is: 
     
         1 . A sealing device comprising a functional layer having a first major surface and a second major surface and a barrier layer directly or indirectly connected to the second major surface of the functional layer, the functional layer comprising:
 a) 20-75 wt.-%, of at least one thermoplastic polymer P 1  and   b) 40-75 wt.-% of a solid filler component F, all proportions being based on the total weight of the functional layer, wherein   the solid filler component F comprises at least one first solid filler F 1  having a median particle size d 50  in the range of 0.5-100 μm and at least one second solid filler F 2  different from the at least one first solid filler F 1 ,   the at least one first solid filler F 1  has a number average particle aspect ratio of not more than 2.5:1 and the at least one second solid filler F 2  has a number average particle aspect ratio of at least 4:1, wherein the particle aspect ratio is defined as a ratio of length and thickness of a particle measured using a dynamic image analysis method conducted according to ISO 13322-2:2006 standard, and   the at least one first solid filler F 1  comprises at least 65 wt.-% of the solid filler component F and the at least one second solid filler F 2  comprises not more than 30 wt.-% of the solid filler component F.   
     
     
         2 . The sealing device according to  claim 1 , wherein the at least one second solid filler F 2  has a median particle length L 50  in the range of 5-350 μm and/or a L 90  particle length in the range of 15-500 μm. 
     
     
         3 . The sealing device according to  claim 1 , wherein particles of the solid filler component F are distributed throughout the entire volume of the functional layer. 
     
     
         4 . The sealing device according to  claim 1 , wherein the at least one first solid filler F 1  comprises at least one inert mineral filler F 11  and/or at least one hydraulic binder F 12 . 
     
     
         5 . The sealing device according to  claim 4 , wherein the at least one inert mineral filler F 11  is selected from the group consisting of calcium carbonate, magnesium carbonate, diatomaceous earth, pumice, dolomite, xonotlite, perlite, barite, and comminuted concrete. 
     
     
         6 . The sealing device according to  claim 1 , wherein the at least one second solid filler F 2  is selected from the group consisting of vermiculite, Wollastonite, mica, and talc. 
     
     
         7 . The sealing device according to  claim 1 , wherein the functional layer has a mass per unit weight in the range of 100-1500 g/m 2 . 
     
     
         8 . The sealing device according to  claim 1 , wherein the barrier layer comprises at least 50 wt.-% of at least one thermoplastic polymer P 2 . 
     
     
         9 . A method for producing a sealing device according to  claim 1 , the method comprising a step of extruding or co-extruding a first molten polymer composition comprising the constituents of the functional layer through an extruder die. 
     
     
         10 . The method according to  claim 9 , wherein the first molten polymer composition is obtained by melt-processing a first starting composition comprising the constituents of the functional layer. 
     
     
         11 . The method according to  claim 9 , wherein the first molten polymer composition further contains a blowing gas, which is released from the first molten polymer composition through a surface of the functional layer discharged from the extruder die. 
     
     
         12 . A sealing device obtained by using the method according to  claim 9 . 
     
     
         13 . A method for waterproofing a substrate, comprising:
 providing the sealing device according to  claim 1 ,   applying a layer of an adhesive composition on at least a portion of the surface of the substrate to form a first adhesive film and on the first major surface of the functional layer of the sealing device to form a second adhesive film, and   contacting the first and second adhesive films to affect adhesive bonding between the substrate and the sealing device.